122741205157 has 4 divisors (see below), whose sum is σ = 123956464716. Its totient is φ = 121525945600.

The previous prime is 122741205143. The next prime is 122741205161. The reversal of 122741205157 is 751502147221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55559675521 + 67181529636 = 235711^2 + 259194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122741205157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122741205127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607629628 + ... + 607629829.

It is an arithmetic number, because the mean of its divisors is an integer number (30989116179).

Almost surely, 2^122741205157 is an apocalyptic number.

It is an amenable number.

122741205157 is a deficient number, since it is larger than the sum of its proper divisors (1215259559).

122741205157 is a wasteful number, since it uses less digits than its factorization.

122741205157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215259558.

The product of its (nonzero) digits is 39200, while the sum is 37.

The spelling of 122741205157 in words is "one hundred twenty-two billion, seven hundred forty-one million, two hundred five thousand, one hundred fifty-seven".